fθ場鏡是使用掃描振鏡或多面體反射鏡，進行2維激光掃描時使用的透鏡。
1.可用于條形碼讀碼器或激光打標
2.激光精密加工
1.利用透鏡的畸變效果，使掃描振鏡等的反射鏡的等速旋轉運動變換為在焦點平面上的光斑的等速直線運動;
2.可以提供相對焦點平面，能垂直照射的遠心型場鏡;
3.可以提供YAG激光的基波(1064nm)和高次諧波(266nm，355nm，532nm)，以及CO2激光(9.3?10.6μm)用fθ場鏡;
| 序號 | 通光孔徑 | 光纖接口 | 適用波長 | 聚焦焦距*1 | 視場范圍 | CCD接口 | 測溫模塊 |
| mm | nm | mm | mm | 接口 | |||
| 1 | ≤20 | D80 | 800~1100 | 80 | θ12 | C/CS | 可選 |
| 2 | ≤20 | SMA-905 | 800~1100 | 125 | θ12 | C/CS | 可選 |
| 3 | ≤20 | QBH | 800~1100 | 160 | θ12 | C/CS | 可選 |
| 4 | ≤20 | 空間光 | 800~1100 | 其它 | θ12 | C/CS | 可選 |
| 備注：*1掃描物鏡采用遠心設計 | |||||||
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